Exhaust Gas Boiler · Boilers
The Alfa Laval S.p.A. Aalborg-XW-A5-16bar is an entry in the Alfa Laval Aalborg XW exhaust-gas economizer family. The Aalborg XW is a water-tube, forced-circulation exhaust-gas economizer used to recover heat from diesel-engine exhaust gas and transfer it into a steam or hot-water circuit according to the installed plant arrangement. It is normally installed in the exhaust-gas path downstream of a main or auxiliary diesel engine and connected to a steam drum or auxiliary boiler system as required by the vessel design. The heating surface uses gilled water tubes, and the unit is designed for marine exhaust-gas conditions where vibration, pulsation and soot deposition must be considered. The A5 suffix identifies the variant recorded in this library, but the provided source does not define how that designation changes heating surface, dimensions or capacity. The additional 16bar suffix is preserved from the library entry; the exact approved design pressure, operating pressure and safety-valve settings must be confirmed from the equipment nameplate, class documentation and Alfa Laval data. Exact steam capacity, gas-side limits, circulation requirements and cleaning arrangements must be taken from the manufacturer documentation for the installed economizer.
What our service work and the manufacturer documentation say about keeping this model running.
Trend exhaust-gas temperatures and gas-side pressure drop where instrumentation is fitted, because changes can indicate fouling. Inspect gilled tubes, casing, expansion joints, supports and soot-blower or cleaning equipment for deposits, leakage, corrosion and damage. Verify forced-circulation pumps, valves, drum level control and protective interlocks associated with the economizer. After water washing or maintenance, ensure the gas side is properly drained and the unit is returned to service in accordance with the approved procedure. Use Alfa Laval and class-approved documentation for exact water chemistry requirements, pressure limits, inspection criteria and safety-device settings.
Keep critical spares for the installed soot-blowing or cleaning equipment, circulation-pump seals and other auxiliary components according to the vessel's redundancy philosophy. Gaskets, instrumentation items and approved repair materials should match the exact economizer specification. Pressure-part repairs and replacement tube work require approved procedures and materials rather than generic onboard substitutions.
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